2010

7.2

2007

5.5

2019

5.4

1976

7.5

2006

6.9

1987

6.1

1972

7.3

1990

6.7

1993

6.6

2001

6.7

1954

6.7

1971

5.9

2003

6.5

2013

6.5

1959

6.1

1980

5.7

1986

5.8

1982

7.4

2011

6.1

2015

6.9